Ion-Cyclotron wave dissipation channel for Alfvén waves

Details Ion-Cyclotron wave dissipation channel for Alfvén waves Ion-Cyclotron wave dissipation channel for Alfvén waves

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1817k&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 13, p. 1817-1820

Physics

Plasma Physics

17

Interplanetary Physics: Solar Wind Plasma, Solar Physics, Astrophysics, And Astronomy: Coronal Holes, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Kinetic And Mhd Theory

Scientific paper

The effect of inhomogeneous velocity flow on Alfvén wave dynamics in the solar wind is investigated. Unlike existing studies in this field that model energy deposition from high-frequency waves to solar wind particles, we consider here the possibility of obtaining high-frequency waves (in this case fast magnetosonic waves) from the ordinary Alfvén wave spectrum. It is shown that the spatial inhomogeneity of the velocity field can lead to dissipation of Alfvén waves through ion-cyclotron resonance. Recent Ultraviolet Coronagraph Spectrometer (UVCS/SOHO) observations indicate that preferential heating and acceleration of heavy ions occurs close to the Sun. The process described here provides a possible interpretation of such solar wind observations.

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